RT8005
1A, 2MHz, High-Efficiency Synchronous Buck PWM Converter
General Description
Features
l 2.4V to 5.5V Input Voltage Range
l Adjustable Output from 0.5V to VIN
l Guaranteed 1A Output Current
The RT8005 is a high-efficiency synchronous buck PWM
converter with integrated P-Channel andN-Channel power
MOSFET switches. Capable of delivering 1A output current
over a wide input voltage range of 2.4V to 5.5V, the RT8005
is ideally suited for portable applications powered by a
single Li-Ion battery or by 3-cellNiMH/NiCd batteries. The
device operates at 2MHz PWM switching fixed frequency,
can use smaller CIN, COUT capacitor and inductor.
l Accurate Reference : 0.5V (±1.5%)
l Up to 90% Conversion Efficiency
l Typical Quiescent Current : 200mA
l Integrated Low RDS(ON) High- and Low-Side Power
MOSFET Switches : 230mW and 180mW
l Current Mode PWM Operation
TheRT8005 integratestwo low RDS(ON) 230mW and 180mW
of high- and low-side switching MOSFETs to reduce board
space, as only resistors and capacitors along with one
inductor are required externally for operation. The RT8005
has adjustable output range down to 0.5V. The other
features include internal soft-start, chip enable, over-
temperature and over-current protections. It is available in
a space-saving VDFN-10L 3x3 package.
l Fixed Frequency : 2MHz
l 100% Maximum Duty Cycle for Lowest Dropout
l Internal Soft-Start
l No Schottky Diode Required
l Over-Temperature and Over-Current Protection
l Small 10-Lead VDFN 3x3 Package
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l Battery-Powered Equipments
Ordering Information
RT8005
l Low Power CPU andDSP Supplies
l Digital Cameras and HardDisks
l Protable Instruments andNotebook Computers
l Celluar Phones, PDAs, and Handheld PCs
l USB-BasedDSL Modems and OtherNetwork Interface
Cards
Package Type
QV : VDFN-10L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green products are :
}RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Pin Configurations
(TOP VIEW)
}Suitable for use in SnPb or Pb-free soldering processes.
}100% matte tin (Sn) plating.
1
2
3
4
5
PGND
PGND
GND
COMP
FB
LX
PVDD
PVDD
VDD
10
9
8
GND
11
7
9
EN
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
VDFN-10L 3x3
DS8005-08 August 2007
www.richtek.com
1